Car-roof



R. w. BURNETT.

CAR ROOF.

APPLICATION FILED sEPL2o. I917.

Patented Nov. 23, 1920.

UNITED STATES P-ATENT OFFICE.

RICHARD W. BURNETT, OFCHIGAGO, ILLINOIS.

can-noon.

erence being had therein to the accompany ing drawing.

he invention relatesto car-root's or that type in which theroofingsheets are arranged beneath channel carlines and are provided withnested flanges Within the channel's oil the carlines, forming inconnection therewith weatherproofing means. The present inventioncomprises the novel construction of flangesby which more thoroughweather-proofing is obtained, and further certain features ofconstruction as hereinafter set forth.

In the drawings: v

Figure 1 is a sectional side elevation through the roof;

Figs. 2 and 3 are similar views showing modified constructions; and

Fig. 4 is a cross-section through the carroof substantially in the plane4-4: Fig. 1.

In the construction of roots of the type,

above referred to it is usual to provide the adjacent upstanding flangesoi the roofing sheets with oppositely returnbent portions nestedtogether and supported uponsaddles or hearing blocks suspended from thecarline. The weather-proofing is effected, first, by the invertedchannel carline which forms -a cap for the nested flanges; and second,

by the nested flanges themselves. Thus any water that may pass betweenthe carline and the sheet must rise above the flanges to find access tothe interior of the car. However, under certain conditions of strongwind pressure, water blown in the crevice beneath the carline may mountthe underlapping flange and be forced between the same and theoverlapping flange to the interior of the car. With my improvedconstruction this eflect is impossible, for the reason that theunderlapping flange is turned in the same direction as the overlappingflange, and any water mounting either of the flanges will. be deflectedoutward or away from the joint. I have also devised an improved means ofsupporting the roofing sheets and for limiting the movement thereof toprevent disengagement, the specific construction being as follows:

Specification of Letters Patent. Patented N 23, 1920. Application filedSeptember 20, 1917, Serial No. 192324;

A is-a carline of inverted channel or Ushaped cross-section, having theoutwardly-extending flanges B, and G are roofing sheetsextending fromeaves to eaves and provided on their opposite edges with upstandingflanges 1) arranged within the channels of the carlines. The adjacentupstanding flanges of adjacent sheets are formed with returnbentportions E and E.

The flange E extends laterally outward or For supporting the sheets Ipreferably provide a ledge or bracket F projecting from the inner faceof the carline, upon which the returnbend of the sheet may rest. In

Figs. 1 and 3 this ledge is shown as an angle bracket-secured to thecarline and projecting inward. therefrom, the inner end being curved orinclined downward to facilitate mounting the returnbends of the sheetsthereon. Displacement of the sheets. from this support maybe preventedby the depending eaves flanges G, which are apertured for the passage ofthe bolts H securing the carline to the side-plate of the car. Theapertures I in these eaves flanges are larger than the bolts passingtherethrough so as to provide a limited freedom of movement to thesheets to compensate for the weaving and flexing of the car, but anymovement suf licient to disengage the returnbends from the ledge F willbe prevented. Another means of accomplishing the same result is theplacing of a stop on, the opposite side of the flanges from the ledge Fto limit the movement thereof. Such a construction is shown in Fig. 1,in which J is a stop mem' ber, preferably struck inward from the metalof the carline adjacent to the neutral axis.

This will not materiallyweaken the carline, as the metal which isremoved is not in, work and the projecting inner end will form alimiting stop for the flanges.

Where the sheets are made of metal of suflicient gage, they may derivesuflicient support from the trussing effect of the upstanding flange andreturnbend, and without the addition of any other supporting means. Sucha construction is shown in Fig. 2-, and, as shown in Fig. 4, theradius'of the carline longitudinally thereof or transversely of the caris different from that of the sheet so as to exert a downward pressurethereon at the center, piacing the metal under tension.

What I claim as my invention is:

1. In a car roof, the combination with an inverted channel carline ofrooting sheets arranged therebeneath and having upstand- 111g flangesadjacent to each-other, the upper portions of said flanges-beingreturnbent I .in-thesame direction and nested and a shelf returnbentflange to form a support for the within sa d carhne engaging the edge ofthe a sheet.

2.7 In a car roof, thecombination with an inverted channel carline, ofroofing sheets arranged therebeneathand having upstanding flangescentrally of the channel, return bent inthe same direction and nested,the free ends of saidreturnbends being adjacent tothe side of thechannel,'a shelf or support within said carline for engaging the freeedge of said returnbent'fiange, and a stop for limiting the movement ofsaid sheets to maintain said returnbent flange in ongagement with saidsupport.

In a car roof, the combination with an inverted channel carline, ofroofin; sheets arranged therebeneath and having upstanding flangescentrally of the channel, said flanges terminating in portionsreturnbent in the same direction and nested, a shell or support withinsaid cal-line for engaging the free edge of a returnbent flange, and astop struck inward from the opposite side of said carline for limitingmovement of the sheets.

In a car roof, the combination with an inverted channel carline, ofroofing sheets arranged therebeneath and having upstanding flangesadjacent to each other, the upper portions of said flanges beingreturnbent in the same direction and nested.

In a car roof, the combination with an inverted channel carline, ofroofing sheets curved transversely of the roof, arranged beneath saidcarline and having upstanding flanges adjacent to each other, the upperportions of said flanges being return-bent in the same direction andnested.

In testimony; whereof I afiix my si natnre.

R CHARD W. BURNETT.

